package com.sky.service.impl;

import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PutMapping;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl implements OrderService{

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WeChatPayUtil weChatPayUtil;
    /*
    * 用户下单
    * */
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
       //排除业务异常，购物车为空,地址薄为空不能下单
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null)
        {
            //抛出业务异常
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        //查询当前购物车的数据
        Long userId = BaseContext.getCurrentId(); //获取用户id
        ShoppingCart shoppingCart=new ShoppingCart();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if (shoppingCartList == null || shoppingCartList.size() ==0)
        {
            //抛出业务异常
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);

        }
        //向订单表插入1条数据
        Orders orders =new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setUserId(BaseContext.getCurrentId());

        orderMapper.insert(orders);

        List<OrderDetail> orderDetailList=new ArrayList<>();
        //向订单明细表插入n条数据,(订单明细表主要是看购物车有多少数据，所以需要遍历购物车)
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail=new OrderDetail();
            BeanUtils.copyProperties(cart,orderDetail);
            orderDetail.setOrderId(orders.getId()); //设置当前订单明细关联的订单id
            orderDetailList.add(orderDetail);
        }
        orderDetailMapper.insetBatch(orderDetailList);

        //清空购物车
        shoppingCartMapper.deleteByUserId(userId);

        //封装VO返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderAmount(orders.getAmount())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .build();
        return orderSubmitVO;
    }
    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {

        OrderPaymentVO vo=new OrderPaymentVO();
        vo.setNonceStr("666");
        vo.setPaySign("hhh");
        vo.setPackageStr("prepay_id=wx");
        vo.setSignType("RSA");
        vo.setTimeStamp("1670380960");

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);
    }
    /*
     * 查询历史订单
     * 订单状态 1待付款 2待接单 3已接单 4 派送中
     * 5已完成 6已取消
     * */
    public PageResult PageQuery(int pageNum, int pageSize, Integer status) {


        PageHelper.startPage(pageNum,pageSize);
        OrdersPageQueryDTO ordersPageQueryDTO=new OrdersPageQueryDTO();

        //填充字段
        ordersPageQueryDTO.setStatus(status);
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        //分页条件查询
        Page<Orders> page= orderMapper.PageQuery(ordersPageQueryDTO);

        List<OrderVO> list =new ArrayList<>();
        //查询除订单明细，并封账如OrderVo进行响应
        if (page != null && page.getTotal()>0)
        {
            //这里的思路就是上面查询出来的条件有值，就直接遍历封装然后返回
            for (Orders orders : page) {
                Long ordersId = orders.getId(); //订单id

                //查询订单明细,通过订单id
              List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(ordersId);
                OrderVO orderVO=new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);
                orderVO.setOrderDetailList(orderDetails);
                list.add(orderVO);
            }
        }
        return new PageResult(page.getTotal(),list);
    }
      /*
      * 查询订单详情
      * */
       public OrderVO details(Long id) {
           //根据id查询订单
         Orders orders =  orderMapper.getById(id);
         //根据订单id查询订单详细
           List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

           //封装vo对象返回
           OrderVO orderVO=new OrderVO();
           BeanUtils.copyProperties(orders,orderVO);
           orderVO.setOrderDetailList(orderDetailList);
           return orderVO;
      }
      /*
      * 取消订单
      * */
      public void UserCancelById(Long id) {

          //根据id查询订单
          Orders ordersDB = orderMapper.getById(id);
          //判断订单是否为空
          if (ordersDB ==null)
          {
              throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
          }
          //订单状态: 1待付款 2待接单 3 已接单 4派送中 5已完成 6已取消
          if (ordersDB.getStatus() >2)
          {
              //已经接单不能取消
              throw  new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
          }
             //获取订单id
             Orders orders=new Orders();
             orders.setId(ordersDB.getId());
             //订单处于待接单状态下，需要进行退款
             if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED))
             {
                 //调用微信支付接口，此处未实现调用，所以注释掉
                /* WeChatPayUtil.refund(
                         ordersDB.getNumber(),//商品订单号
                         ordersDB.getNumber(), //商家退款单号
                         new BigDecimal(0.01), //退款金额
                          new BigDecimal(0.01)); //原订单金额                 );
                 */
                 //支付状态改为退款
                 orders.setPayStatus(Orders.REFUND);
             }
             //更新订单状态，取消原因，取消时间
               orders.setStatus(Orders.CANCELLED);
               orders.setCancelReason("用户取消");
               orders.setCancelTime(LocalDateTime.now());
               orderMapper.update(orders);


      }
             /*
             * 再来一单
             * */
             public void repetition(Long id) {

                 //获取当前用户id
                 Long userId = BaseContext.getCurrentId();

                 //根据id查询订单详情
                 List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

                 //将订单详情对象转换为购物车对象
                List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x ->{
                     ShoppingCart shoppingCart =new ShoppingCart();
                     //将原订单详情里面的菜品信息重新赋值到购物车中
                     BeanUtils.copyProperties(x,shoppingCart,"id");
                     shoppingCart.setUserId(userId);
                     shoppingCart.setCreateTime(LocalDateTime.now());

                     return shoppingCart;

                 }).collect(Collectors.toList());

                 //将购物车对象的数据批量插入数据中
                 shoppingCartMapper.insertBatch(shoppingCartList);

             }

    /*
     * 订单搜索
     * */
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {

       PageHelper.startPage(ordersPageQueryDTO.getPage(),ordersPageQueryDTO.getPageSize());
       //开始分页
       Page<Orders> page = orderMapper.PageQuery(ordersPageQueryDTO);
       //部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(page);

        return new PageResult(page.getTotal(), orderVOList);
    }

    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        // 需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();

        List<Orders> ordersList = page.getResult();
        if (!CollectionUtils.isEmpty(ordersList)) {
            for (Orders orders : ordersList) {
                // 将共同字段复制到OrderVO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                String orderDishes = getOrderDishesStr(orders);

                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }


    /*
     * 各个状态订单数量统计
     * */
    public OrderStatisticsVO statistics() {
        //根据状态，分别查询出待接单，待派送，派送各种的订单数量
      Integer tobeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer Confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);


        //将查询出的数据封装到OrderStatisticsVO响应返回
        OrderStatisticsVO orderStatisticsVO=new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(tobeConfirmed);
        orderStatisticsVO.setConfirmed(Confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);

        return orderStatisticsVO;
    }

    /*
    * 接单 业务规则，把状态改为接单就行，这里的status=3就代表接单
    * */
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders=Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();
        orderMapper.update(orders);

    }
    /*
    * 拒单
    * */
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception {

        //根据id查询订单
        Orders orderDB = orderMapper.getById(ordersRejectionDTO.getId());
        //订单只有存在并且状态为2(待接单)才能拒单
        if (orderDB== null || !orderDB.getStatus().equals(Orders.TO_BE_CONFIRMED))
        {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //订单状态
        Integer payStatus = orderDB.getStatus();
        if (payStatus == Orders.PAID)
        {
         //调用微信接口退款
          /*  String refund = weChatPayUtil.refund(
                    orderDB.getNumber(),
                    orderDB.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01));*/
           /* log.info("申请退款：{}", refund);*/
        }

        //拒单之后退款,根据订单id更新订单状态，拒单原因，取消时间
        Orders orders=new Orders();
        orders.setId(orderDB.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());

        orderMapper.update(orders);

    }

     /*
     * 取消订单
     * */
    public void cancel(OrdersCancelDTO ordersCancelDTO) {
        //获得订单id
        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());

        //获得订单状态
        Integer status = ordersDB.getStatus();
        if (status == 1)
        {
         /*   //用户已支付，需要退款
            String refund = weChatPayUtil.refund(
                    ordersDB.getNumber(),
                    ordersDB.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01));
            log.info("申请退款：{}", refund);
*/
        }
        //管理端取消订单需要退款，根据订单id更新订单状态、取消原因、取消时间
        Orders orders=new Orders();
        orders.setId(ordersCancelDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /*
    * 派送订单
    * */
    public void delivery(Long id) {
        //获取订单id
        Orders ordersDB = orderMapper.getById(id);

        if (ordersDB == null || ordersDB.getStatus().equals(Orders.CONFIRMED) )
        {
            throw  new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //更新订单状态,转为派送中
        Orders orders=new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
        orderMapper.update(orders);
    }
    /*
    * 完成订单
    * */

    public void complete(Long id) {
        //获取订单id
        Orders ordersDB = orderMapper.getById(id);

        Integer status = ordersDB.getStatus();

        if (ordersDB == null || !status.equals(Orders.DELIVERY_IN_PROGRESS))
        {

            throw  new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);

        }
        //更新订单信息
        Orders orders=new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());
        orderMapper.update(orders);



    }
}
